Slot of an electric machine - QuickField simulation example
This is an example of the slot of an electric machine simulation, performed with QuickField software.
How to find temperature distribution in electric machine stator slots?
Answer Typical applications Geometry
All dimensions are in millimeters. Domain is a 10-degree segment of the stator section. Two armature bars laying in the slot generate ohmic loss. Cooling is provided by convection to the axial cooling duct and both surfaces of the core.
Given
Task
Solution
Results
Engineering question
Set up a plane-parallel QuickField Steady-state Heat Transfer problem for an electric machine stator slot and evaluate temperature distribution from computed field results.
electric machine stator slots, stator tooth regions, winding slot structures
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Simulation problem
Problem Type
Plane-parallel problem of heat transfer.
Specific copper loss Q = ρ*j*j = (1 / 56MS/m) * 3A/mm² * 3A/mm² = 160 kW/m³;
Thermal conductivity of materials: steel 25 W/K-m, copper 380 W/K-m, insulation 0.15 W/K-m, wedge 0.25 W/K-m.
Outer stator surface convection coefficient 10 W/K-m², air temperature 20°C.
Cooling duct convection coefficient 50 W/K-m², air temperature 40°C.
Inner stator surface convection coefficient 70 W/K-m², air temperature 40°C.
Calculate temperature distribution in the stator tooth zone of an electric machine.
Due to model symmetry only a single slot is included in the model.
QuickField automatically assigns zero heat flux boundary condition on external boundaries.
Temperature distribution in a slot of an electric machine:
Video
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